Release Time:2019-03-11  Hits:

Indexed by: Conference Paper

Date of Publication: 2011-11-13

Included Journals: Scopus、CPCI-S、EI

Volume: 8311

Key Words: Fiber Bragg grating; Non-Balanced Interferometer; Phase Generation Carrier; Dynamic Demodulation

Abstract: Non-equilibrium interferometric Fiber Bragg Grating (FBG) sensor is suitable for the accurate measurements of high-frequency dynamic stress, vibration, etc because of its high sensitivity and high frequency response compared to other types of FBG sensors. In this paper, a Phase Generation Carrier (PGC) demodulation technique of non-equilibrium interferometric FBG sensor that based on ARCTAN algorithm by using an arctangent algorithm with a simple method, has been investigated, which can avoid the high-frequency noise increases, the error accumulation, the integrator signal jump of the integrator and other inherent weaknesses in the system. ARCTAN has a better response characteristic of the mutant signals, especially for low-frequency large-signal that can be demodulated with a greater range. The experimental result demonstrate that implementing measured resolution can up to 10ne/vHz@500Hz in vibration strain, a signal sampling rate to 100 KHz and a frequency response range up to 1 KHz. This method can improve the performance of the system greatly which has potential significance for practical sensor application. © 2011 SPIE-OSA-IEEE.